Sucker-rod elevator



(No Model.)

H. KNOX. I SUGKBRROD ELEVATOR.

Nd.502,974.- PatentedAugS, 1893.

H" M w kz m jg UNiTED STAT S PATENT Fries.

HARVEY KNOX, OF RIXFORD, PENNSYLYANIA.

SUCKER-ROD ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 502,974, dated August 8, 1893.

I Application filed December 8, 1892. Serial No. 4541504. (No model.)

To all whom it may concern.-

Be'it known that I, HARVEY KNOX, of Bi ford, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Sucker-Rod Elevators; and I do hereby declare the following to be at'ull, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification. My invention relates to an improvement in sucker rod elevators; and it consists in the novel combination and arrrangement of parts which will be fully described hereinafter and particularly referred to in the claims.

The object of my invention is to provide an elevator with a lifting hook of such form that it can be readily removed or replaced With-i otut springing apart the forks of the elevator s cm.

A further object of my invention is to provide an improved swivel at the upper end of the elevator, for a like purpose, viz;-so that in case of breakage a new swivel can be conveniently substituted.

Referring'to the accompanying drawings Figure 1, is aperspective view of my improved surface. Fig. 2, is a similar view of the hook member detached with its sections separated. Fig. 3, is a detached view of the swivel. Figs. 4 and 5 are sectional views on lines4et and 55 respectively of Fig. 3.

A designates the stem of the elevator having the forked lower end B. The hook member O is formed of two separable sections as shown in Fig. 2. The adjacent faces of these sections are cut obliquely, and the said oblique cuts extend in opposite directions from end to end of the respective sections, so that one section is thickest at the U-shaped end of the hook and thinnest at its opposite end while the reverse is true of the other section; Formed on the thicker end of each of these sections is a trunnion D,and these trnnnions bear in openings in the lower ends of the forks B, thus giving the hook member a pivotal support which allows it to swing from a vertical to a horizontal position, or vice ve'rsa, as may be desired. By this arrangement it will be seen thatif one hook section is broken by undue strain or by accident it may be replaced without substituting an entirely new hook. A further advantage of this arrangement is that flaws in the sections may be readily discovered in putting together the parts owing to the extent of surface exposed to view. Extending inward from one of the forks B, is a removable lug E, against which the hook member strikes when turned to a horizontal position and which serves to hold the same in this position while the elevator is being brought to a point for attaching to the rod. This removable lug is wedge shaped, as shown, so as to fit tightly in the opening in the fork B. The inner end of the wedge is split, as shown, to receive a small securing wedge E. By having this lug removable repairs can easily be made in case the lug breaks, thus avoiding the expense of an entirely new fork. A sleeve F moves vertically on the stem A and formed thereon is an on; set G in which is firmly secured the depending finger H which is for the purpose of holding the rod in the hook in the ordinary manner. At the upper end of the stem A is formed a recess J which is open at one side as well as its top and extending inward over the recess fromthe sides of the same are the shoulders I. Adapted to fit the recess J is the pear shaped projection K at the lower endof the stem L which depends through the opening at the top of the recess J. The top edges of the projection K form shoulders which bear against the shoulders I, thus confining the said projection within the recess. The side of the latter is closed by the removable plate M, which is held in place by a bolt N, which passes through the projection K, to the opposite side of the stem, thus forming an additional hold for the projection of the stem.

Upon the projected end of the stem L is secause the stem L should be broken orbecome bent it may be removed fromthe link in a most easy and simple manner and a new one substituted.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-- 1. A sucker rod elevator comprising a stem, a fork at its lower end, two longitudinal hook sections, a means for securing them together to form a complete elevating hook, and trunnions D on opposite ends of the hook sections which bear in the arms of the fork, substantially as shown and described.

2. A sucker rod elevator comprising astein, a fork at its lower end, an elevating hook within the fork, and the tapering and beveled lug E removably secured to and projecting inward from one of the fork arms, substantially as shown and described.

3. A sucker rod elevatorcomprising astem having a recess near its upper end, a head therein, a stem extending outward from the head, a link secured thereto, a plate for confining the head in position and a bolt extended through the plate, head and stem for binding the same together, substantially as shown and described.

4. An elevator comprising a stem, a fork at itslower end, a hook formed of longitudinal separable sections having oblique adjacent faces, a trunnion on the thicker end of each section which trunnions bear in openings in the prongs of the fork, and a means for holding the thing grasped within the hook, substantially as shown and described.

5. A sucker rod elevator comprisingastcm having a recess at its upper end, a swivel stem, a projection at its lower end which is adapted to be confined in the recess of the stem, a link secured to the outer end of the swivel stem, and a rod grasping device at the lower end of the stem, substantially as shown and described.

6. Au elevator comprising a stem having a recess in its upper end, a swivel stem, a pear shaped projection at its lower end which fits said recess, a removable plate for closing said recess and confining the projection therein, a link having a pear shaped opening in its lower end through which the said stem extends, and an elevating hook at the lower end of the stem, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

HARVEY KNOX.

W'itnesses:

J. L. ANDREWS, THOMAS OSBORNE. 

